biome map stuff

mc/gen/multi_noise_test.go

@@ -0,0 +1,55 @@
+package gen
+
+import (
+	"testing"
+)
+
+func TestLoadMultiNoise(t *testing.T) {
+	for _, version := range []string{"1.21.8", "1.21.9", "1.21.11"} {
+		data, err := LoadMultiNoise(version)
+		if err != nil {
+			t.Fatalf("LoadMultiNoise(%q): %v", version, err)
+		}
+		if len(data.Presets[MultiNoiseOverworld]) == 0 {
+			t.Errorf("%s: overworld preset empty", version)
+		}
+		if len(data.Presets[MultiNoiseNether]) == 0 {
+			t.Errorf("%s: nether preset empty", version)
+		}
+	}
+}
+
+func TestMultiNoiseLookup_NetherOrigin(t *testing.T) {
+	data, err := LoadMultiNoise("1.21.11")
+	if err != nil {
+		t.Fatalf("LoadMultiNoise: %v", err)
+	}
+	biome, err := data.Lookup(MultiNoiseNether, 0, 0, 0, 0, 0, 0)
+	if err != nil {
+		t.Fatalf("Lookup: %v", err)
+	}
+	if biome != "minecraft:nether_wastes" {
+		t.Errorf("nether origin = %s, want minecraft:nether_wastes", biome)
+	}
+}
+
+func TestBiomeNoise_SampleBiome(t *testing.T) {
+	var worldSeed int64 = 70388202460762
+	x := XoroshiroFromSeed(worldSeed)
+	x.Mix()
+	b := BiomeNoiseFromXoroshiro(x, false)
+	data, err := LoadMultiNoise("1.21.11")
+	if err != nil {
+		t.Fatalf("LoadMultiNoise: %v", err)
+	}
+
+	biome, err := b.SampleBiome(-1, -16, 0, data, MultiNoiseOverworld)
+	if err != nil {
+		t.Fatalf("SampleBiome: %v", err)
+	}
+
+	expected := "minecraft:bamboo_jungle"
+	if biome != expected {
+		t.Errorf("SampleBiome(-1, -16, 0) = %s, want %s", biome, expected)
+	}
+}